CN210427381U - Light guide plate black spot defect detection device - Google Patents
Light guide plate black spot defect detection device Download PDFInfo
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- CN210427381U CN210427381U CN201920906924.6U CN201920906924U CN210427381U CN 210427381 U CN210427381 U CN 210427381U CN 201920906924 U CN201920906924 U CN 201920906924U CN 210427381 U CN210427381 U CN 210427381U
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Abstract
The utility model provides a light guide plate black spot defect detecting device: the device comprises a transmission module, a limiting module, a detection module and an image acquisition module; the conveying module comprises an output V belt, an output integrated double belt wheel, an output main shaft I, a conveying belt II, an output auxiliary shaft I, an input shaft II, an output main shaft II, an input shaft I, a V-shaped conveying belt, a belt wheel and an output auxiliary shaft II; the limiting module comprises a baffle plate, an optical axis and a lead screw; the detection module comprises a photoelectric sensor; the photoelectric sensor is positioned right below the conveyor belt. The utility model discloses at conveyer belt both sides rational design stop device, guaranteed the gesture of light guide plate. The reasonable matching of the detection device and the image acquisition device is also a big advantage, when the photoelectric sensor detects the light guide plate, the light source is lightened, and the area-array camera is triggered to continuously acquire high-quality pictures to prepare for a subsequent detection algorithm.
Description
Technical Field
The utility model relates to a production detects technical field, concretely relates to light guide plate black spot defect detecting device.
Background
The Light Guide Plate (Light Guide Plate, LGP) is mainly made of optical acrylic Plate, the chemical name of which is methyl methacrylate, and is formed by utilizing optical-grade acrylic Plate and then using high-tech materials with extremely high reflectivity and no Light absorption to print Light Guide points on the bottom surface of the optical-grade acrylic Plate by using laser engraving, cross grid engraving and screen printing technologies. The light guide plate has the advantages of being ultrathin, ultra-bright, uniform in light guide, energy-saving, environment-friendly, durable, simple and fast to install and maintain and the like, and therefore the light guide plate is widely applied to occasions such as liquid crystal display, advertising lamps, lights, panel lamp illumination and the like. In the production and manufacturing processes of silk-screen printing, chemical etching, laser processing, point-hitting processing and the like of the light guide plate, due to the influence of factors such as raw material components, equipment use conditions, processing technology, worker operation and the like, processing defects such as bright spots, missing points, black spots, screen printing ink, line scratches, mirror surface point damages, shadows and the like inevitably occur on the surface of the light guide plate. The existence of light guide plate defect can influence the use of relevant equipment, leads to the availability factor of equipment, and luminous homogeneity and life-span etc. all can receive the influence, and in addition, the credit of enterprise can seriously be harmd in the sales of defect light guide plate, causes great negative effect to the long-term development of enterprise, consequently, carries out quality testing to the light guide plate of production, rejects the inferior product and is especially important.
At present, domestic light guide plate defect detection is mainly completed by manual operation, but the manual detection has obvious limitation and numerous disadvantages. The following disadvantages exist in manual detection: 1. the detection quality is unstable due to subjective judgment and long-time eye fatigue; 2. the labor cost is high; 3. the labor intensity is high; 4. low labor efficiency and the like.
Accordingly, there is a need for improvements in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an efficient light guide plate black spot defect detecting device.
In order to solve the technical problem, the utility model provides a light guide plate black spot defect detecting device: the device comprises a transmission module, a limiting module, a detection module and an image acquisition module;
the conveying module comprises an output V belt, an output integrated double belt wheel, an output main shaft I, a conveying belt II, an output auxiliary shaft I, an input shaft II, an output main shaft II, an input shaft I, a V-shaped conveying belt, a belt wheel and an output auxiliary shaft II;
the conveying belt is sleeved on a first output main shaft, a first output auxiliary shaft and a first input shaft which are sequentially arranged; the conveyor belt is sleeved on a second output main shaft, a second output auxiliary shaft and a second input shaft which are sequentially arranged; the tail end of the first conveyor belt is connected with the head end of the second conveyor belt;
the output same-body double belt wheel is arranged on the output main shaft I, the belt wheel is arranged on the output main shaft II, the output same-body double belt wheel is connected with the belt wheel through a V-shaped conveying belt, and the output same-body double belt wheel is connected with a servo motor through an output V belt;
the limiting module comprises a baffle plate, an optical axis and a lead screw; the number of the baffles is two, and the two baffles are symmetrically arranged on two sides of the second conveyor belt; the screw rod is arranged between the two optical axes, the two ends of the baffle are respectively connected with the two optical axes in a sliding manner, and the screw rod penetrates through the middle part of the baffle; the left side and the right side of the screw rod are respectively provided with external threads with opposite thread directions, corresponding internal threads are arranged inside the middle part of the baffle plate, and the two baffle plates are respectively arranged on the left side and the right side of the screw rod;
the detection module comprises a photoelectric sensor; the photoelectric sensor is positioned right below the first conveyor belt;
the image acquisition module comprises a camera lead screw lifting platform, a camera, a light source lead screw lifting platform and a light source;
the camera is connected with the camera lead screw lifting table; the camera is positioned right above the first conveyor belt, and a lens of the camera vertically faces downwards to the first conveyor belt; the light source is connected with the light source lead screw lifting table and is positioned right below the conveyor belt; the light source and the camera are positioned on the same vertical straight line, and the light source vertically and upwards faces the first conveyor belt;
the tail end of the second conveyor belt is provided with a rotating wheel;
the camera is in signal connection with the photoelectric sensor.
As right the utility model discloses light guide plate black spot defect detecting device's improvement:
the conveying module further comprises a first spacing plate and a second spacing plate;
the first partition plate is arranged between the first output main shaft and the first output auxiliary shaft, and the second partition plate is arranged between the second output main shaft and the second output auxiliary shaft.
As right the utility model discloses light guide plate black spot defect detecting device's further improvement:
and the lead screw is provided with a lead screw knob and a lead screw nut.
As right the utility model discloses light guide plate black spot defect detecting device's further improvement:
and the baffle is provided with rollers on one side surface facing the two sides of the conveyor belt.
The utility model discloses light guide plate black spot defect detecting device's technical advantage does:
the transmission structure formed by the belt wheel, the V-shaped belt, the rotating shaft, the double belt wheels in the same body, the conveying belt and the like controls the conveying belt to convey the light guide plate at the uniform speed. And the limiting devices are reasonably designed on two sides of the conveying belt, so that the posture of the light guide plate is ensured. The reasonable matching of the detection device and the image acquisition device is also a big advantage, when the photoelectric sensor detects the light guide plate, the light source is lightened, and the area-array camera is triggered to continuously acquire high-quality pictures to prepare for a subsequent detection algorithm. The high-quality image acquisition device of the light guide plate can realize automatic operation and further improve the detection efficiency of the light guide plate.
Drawings
The following describes the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view of the device for detecting black spot defects of a light guide plate according to the present invention;
FIG. 2 is a schematic view of the structure of the black spot defect inspection device of the light guide plate according to the present invention;
fig. 3 is the side view schematic structure of the light guide plate black spot defect detecting device of the present invention.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
Embodiment 1, a light guide plate black spot defect detecting apparatus, as shown in fig. 1-3, includes a conveying module, a limiting module, a detecting module, an image collecting module, supports 1-17, and support plates 1-19.
A transmission module: for conveying the light guide plate to different stations;
a limiting module: the light guide plate is used for adjusting the posture of the light guide plate and ensuring that the angles of subsequently acquired images are approximately the same;
a detection module: the system is used for detecting whether the light guide plate reaches a designated station or not, and sending a signal to trigger the image acquisition module to work if the light guide plate is detected;
an image acquisition module: the image acquisition module is used for acquiring images of the light guide plate, and if the detection module sends a signal, the image acquisition module starts to acquire the images;
the brackets 1-17 and the supporting plates 1-19 are connected with each other to play a role in supporting and fixing the whole device. The transmission module, the limiting module, the detection module and the image acquisition module are respectively connected with the supporting plates 1-19.
The conveying module and the detection module are fixed above the supporting plates 1-19, the limiting modules are positioned on two sides of the conveying module, the detection module is positioned below the conveying module, the image acquisition module comprises a camera part and a light source part, the camera part is positioned above the conveying module, and the light source part is positioned below the conveying module;
a transmission module: the transmission module comprises an output V belt 1-12, an output integrated double belt wheel 1-13, an output main shaft I1-14, a transmission belt I1-15 a, a transmission belt II 1-15b, an output auxiliary shaft I1-16, an input shaft II 2-1, an output main shaft II 2-2, a rotating shaft support frame 2-6, a rotating shaft support frame base 2-7, a spacing plate I2-8, a spacing plate II 2-9, an input shaft I2-11, a V-shaped transmission belt 2-12, a belt wheel 2-13 and an output auxiliary shaft II 2-14;
the first-stage conveying part is formed by the first conveying belts 1-15a, the first output main shafts 1-14, the first output auxiliary shafts 1-16 and the first input shafts 2-11, namely the first conveying belts 1-15a are sleeved on the first output main shafts 1-14, the first output auxiliary shafts 1-16 and the first input shafts 2-11 which are arranged in sequence;
the second-stage conveying part is formed by the second conveying belts 1-15b, the second output main shafts 2-2, the second output auxiliary shafts 2-14 and the second input shafts 2-1, namely the second conveying belts 1-15b are sleeved on the second output main shafts 2-2, the second output auxiliary shafts 2-14 and the second input shafts 2-1 which are arranged in sequence;
the first partition plates 2-8 are arranged between the first output main shafts 1-14 and the first output auxiliary shafts 1-16, and the second partition plates 2-9 are arranged between the second output main shafts 2-2 and the second output auxiliary shafts 2-14. The first partition plate 2-8 and the second partition plate 2-9 are fixedly connected with the rotating shaft support frame 2-6, and play a role in fixing the transmission module.
Two ends of the first-stage transmission part (the first output main shaft 1-14, the first output auxiliary shaft 1-16 and the first input shaft 2-11), the second-stage transmission part (the second output main shaft 2-2, the second output auxiliary shaft 2-14 and the second input shaft 2-1), the first partition plate 2-8 and the second partition plate 2-9 are respectively and fixedly connected with the two rotating shaft supporting frames 2-6, the rotating shaft supporting frames 2-6 are fixedly connected with the tops of the rotating shaft supporting frame bases 2-7, and the bottoms of the rotating shaft supporting frame bases 2-7 are connected with the supporting plates 1-19 to play a role in fixing.
The first output main shaft 1-14 is provided with a first output integrated double belt wheel 1-13, the second output main shaft 2-2 is provided with a belt wheel 2-13, the first output integrated double belt wheel 1-13 and the belt wheel 2-13 are connected through a V-shaped conveying belt 2-12, and the first output integrated double belt wheel 1-13 is also connected with a servo motor through a first output V belt 1-12.
The transmission module has the functions of: the transmission module penetrates through the whole light guide plate defect detection system and is used for transmitting the light guide plate to different stations; the servo motor provides power for the whole transmission module; the servo motor transmits power to the device through the output V-shaped belt 1-12, specifically transmits the power to the first-stage transmission part through the output same-body double belt wheels 1-13, and transmits the power to the second-stage transmission part through the V-shaped conveying belt 2-12 and the belt wheels 2-13.
The limiting module comprises 2-10 parts of baffle plates, 2-15 parts of idler wheels, 2-16 parts of optical axes, 2-19 parts of lead screws, 2-20 parts of lead screw knobs and 2-21 parts of lead screw nuts,
the number of the baffles 2-10 is two, the two baffles 2-10 are respectively arranged on two sides of the second conveying belt 1-15b, a plurality of rollers 2-15 are arranged on one side face, facing the second conveying belt 1-15b, of the baffles 2-10, the baffles 2-10 are in sliding connection with the optical axis 2-16, and the lead screw knobs 2-20 and the lead screw nuts 2-21 are arranged on the lead screws 2-19;
a screw rod 2-19 is arranged between the two optical axes 2-16, and two ends of the baffle 2-10 (the length direction of the baffle 2-10 is the same as the moving direction of the second conveyor belt 1-15b) are respectively connected with the two optical axes 2-16 in a sliding way. The lead screw 2-19 passes through the middle part of the baffle 2-10. The left side and the right side of the screw rod 2-19 are respectively provided with external threads with opposite thread directions, the inner part of the middle part of the baffle plate 2-10 is provided with corresponding internal threads, and the two baffle plates 2-10 are respectively arranged on the left side and the right side of the screw rod 2-19.
One end of the screw rod 2-19 is provided with a screw rod knob 2-20, the screw rod knob 2-20 can drive the screw rod 2-19 to rotate, and the screw rod knob 2-20 rotates clockwise to drive the two baffle plates 2-10 to move in opposite directions; the lead screw knob 2-20 rotates anticlockwise to drive the two baffle plates 2-10 to deviate, namely, the distance between the two baffle plates is larger and larger. After the feed screw nuts 2-21 are screwed down, the feed screws 2-19 cannot rotate, and the feed screw nuts 2-21 are used for limiting.
The limiting module acts as follows: the light guide plate is used for adjusting the posture of the light guide plate and ensuring that the angles of subsequently acquired images are approximately the same; the spacing part formed by the rollers 2-15 and the baffles 2-10 can adjust the distance between the two spacing parts through the screw rod knobs 2-20 and is locked by the screw rod nuts 2-21 to prevent sliding.
The detection module comprises a photoelectric sensor 2-17 and a sensor holder 2-18. The photoelectric sensors 2-17 are connected with the sensor supports 2-18, and the sensor supports 2-18 are connected with the supporting plates 1-19 to play a role in fixing; the photoelectric sensors 2-17 are positioned right below the first conveyor belts 1-15 a.
The detection module has the following functions: the light guide plate detection device is used for detecting whether the light guide plate reaches an appointed station or not, and sending a signal to trigger the image acquisition module to work if the light guide plate is detected.
The image acquisition module comprises a second camera bracket 2-3, a second camera screw lifting platform 2-4, a second camera 2-5, a light source support 2-22, a second light source screw lifting platform 2-23 and a second light source 2-24;
the image acquisition module is connected with: the camera 2-5 is connected with the camera screw lifting table 2-4, the camera screw lifting table 2-4 is connected with the camera support II 2-3, the camera support II 2-3 is connected with the top of the supporting plate 1-19 to play a role in fixing, the camera 2-5 is positioned right above the conveyor belt I1-15 a, and the lens of the camera 2-5 vertically faces downwards to the conveyor belt I1-15 a; the light source 2-24 is connected with the light source lead screw lifting table 2-23, the light source lead screw lifting table 2-23 is connected with the light source support 2-22, the light source support 2-22 is connected with the support plate 1-19 to play a role in fixing, the light source 2-24 and the camera 2-5 are positioned on the same vertical straight line, the light source 2-24 vertically faces upwards to the first conveyor belt 1-15a, the support plate 1-19 is provided with a hole matched with the light source 2-24 for use, and the hole of the support plate 1-19 is used for light irradiated by the light source 2-24 to pass through, so that the light can irradiate the first conveyor belt 1-15 a;
the image acquisition module has the functions of: the image acquisition module is used for acquiring images of the light guide plate, and if the detection module sends a signal, the image acquisition module starts to acquire the images; wherein the camera screw lifting platform 2-4 and the light source screw lifting platform 2-23 can adjust the heights of the light sources 2-24 and the cameras 2-5.
A rotating wheel 3-1 is arranged obliquely below the tail end of the second conveying belt 1-15 b; the rotating wheel 3-1 is rotatably arranged on the rotating wheel support, the rotating wheel 3-1 is arranged on the supporting plate 1-19 through the rotating wheel support, the rotating wheel 3-1 is abutted against the second conveying belt 1-15b, and the rotating wheel 3-1 can be driven to rotate in the opposite direction when the second conveying belt 1-15b rotates. The rotating wheel 3-1 can prevent the light guide plate from falling into a gap between the two conveying belts 1-15b when the tail ends of the two conveying belts are connected with other stations.
The utility model discloses light guide plate black spot defect detecting device's application method:
step 1, starting a light guide plate black spot defect detection device, driving an output main shaft I1-14 to rotate by a servo motor through an output V belt 1-12 and an output integrated double belt wheel 1-13, and driving a conveyor belt I1-15 a to move by the output main shaft I1-14;
the output integrated double belt wheels 1-13 also drive the output main shaft II 2-2 to rotate through the V-shaped conveyor belt 2-12 and the belt wheels 2-13; the second output main shaft 2-2 drives the second conveyor belt 1-15b to move;
then, the light guide plate is placed on a first conveyor belt 1-15a in the conveying module, and the light guide plate moves forwards at a constant speed along with the first conveyor belt 1-15 a;
step 2, when the specified position is reached, the photoelectric sensors 2-17 in the detection device detect the light guide plate and send signals to the image acquisition device; executing the step 3;
step 3, after receiving the signal of the detection device, lighting a light source 2-24 in the image acquisition device, and simultaneously carrying out continuous image acquisition by a camera 2-5 to acquire a series of images; executing the step 4;
step 4, the light guide plate enters a second conveyor belt 1-15b from the first conveyor belt 1-15 a; and the limiting devices on the two sides of the conveyor belt adjust the postures of the light guide plates on the second conveyor belt 1-15b, and then the light guide plates enter the subsequent devices.
Finally, it is also noted that the above-mentioned list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (4)
1. Light guide plate black spot defect detection device, its characterized in that: the device comprises a transmission module, a limiting module, a detection module and an image acquisition module;
the transmission module comprises an output V belt (1-12), an output one-body double belt wheel (1-13), an output main shaft I (1-14), a transmission belt I (1-15a), a transmission belt II (1-15b), an output auxiliary shaft I (1-16), an input shaft II (2-1), an output main shaft II (2-2), an input shaft I (2-11), a V-shaped transmission belt (2-12), a belt wheel (2-13) and an output auxiliary shaft II (2-14);
the first conveyor belt (1-15a) is sleeved on a first output main shaft (1-14), a first output auxiliary shaft (1-16) and a first input shaft (2-11) which are arranged in sequence; the second conveyor belt (1-15b) is sleeved on the second output main shaft (2-2), the second output auxiliary shaft (2-14) and the second input shaft (2-1) which are sequentially arranged; the tail end of the first conveyor belt (1-15a) is connected with the head end of the second conveyor belt (1-15 b);
the output same-body double belt wheels (1-13) are arranged on the first output main shafts (1-14), the belt wheels (2-13) are arranged on the second output main shafts (2-2), the output same-body double belt wheels (1-13) are connected with the belt wheels (2-13) through V-shaped conveying belts (2-12), and the output same-body double belt wheels (1-13) are connected with a servo motor through output V belts (1-12);
the limiting module comprises a baffle plate (2-10), an optical axis (2-16) and a lead screw (2-19); the number of the baffles (2-10) is two, and the two baffles (2-10) are symmetrically arranged on two sides of the second conveyor belt (1-15 b); the screw rod (2-19) is arranged between the two optical axes (2-16), two ends of the baffle plate (2-10) are respectively connected with the two optical axes (2-16) in a sliding manner, and the screw rod (2-19) penetrates through the middle part of the baffle plate (2-10); the left side and the right side of the screw rod (2-19) are respectively provided with external threads with opposite thread directions, the inner part of the middle part of the baffle plate (2-10) is provided with corresponding internal threads, and the two baffle plates (2-10) are respectively arranged on the left side and the right side of the screw rod (2-19);
the detection module comprises a photoelectric sensor (2-17); the photoelectric sensors (2-17) are positioned right below the first conveyor belt (1-15 a);
the image acquisition module comprises a camera screw lifting platform (2-4), a camera (2-5), a light source screw lifting platform (2-23) and a light source (2-24);
the camera (2-5) is connected with the camera screw rod lifting table (2-4); the camera (2-5) is positioned right above the first conveyor belt (1-15a), and a lens of the camera (2-5) faces the first conveyor belt (1-15a) vertically downwards; the light source (2-24) is connected with the light source lead screw lifting table (2-23), and the light source (2-24) is positioned under the first conveyor belt (1-15 a); the light source (2-24) and the camera (2-5) are positioned on the same vertical straight line, and the light source (2-24) faces the first conveyor belt (1-15a) vertically upwards;
the tail end of the second conveyor belt (1-15b) is provided with a rotating wheel (3-1);
the camera (2-5) is in signal connection with the photoelectric sensor (2-17).
2. The apparatus for detecting black spot defect of light guide plate according to claim 1, wherein:
the conveying module further comprises a first partition plate (2-8) and a second partition plate (2-9);
the first spacing plate (2-8) is arranged between the first output main shaft (1-14) and the first output auxiliary shaft (1-16), and the second spacing plate (2-9) is arranged between the second output main shaft (2-2) and the second output auxiliary shaft (2-14).
3. The apparatus for detecting black spot defect of light guide plate according to claim 2, wherein:
the lead screw (2-19) is provided with a lead screw knob (2-20) and a lead screw nut (2-21).
4. The apparatus for detecting black spot defect of light guide plate according to claim 3, wherein:
and the side, facing the second conveyor belt (1-15b), of the baffle (2-10) is provided with rollers (2-15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906924.6U CN210427381U (en) | 2019-06-17 | 2019-06-17 | Light guide plate black spot defect detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920906924.6U CN210427381U (en) | 2019-06-17 | 2019-06-17 | Light guide plate black spot defect detection device |
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| Publication Number | Publication Date |
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| CN210427381U true CN210427381U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920906924.6U Active CN210427381U (en) | 2019-06-17 | 2019-06-17 | Light guide plate black spot defect detection device |
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| CN (1) | CN210427381U (en) |
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- 2019-06-17 CN CN201920906924.6U patent/CN210427381U/en active Active
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